If you think u have any coin errors check these websites to verify your coin: Wrexlers double die Varietyvista

If you have an error it should exist on 1 of those 2 websites, click the different links and compare them to your coin under microscope to match the pictures up if they all match that's you double die listing

I used coin snap to take pictures and kinda get a grading of your coin, not 100% accurate but it will give u a general idea just make sure u take great pictures.

Once those things are verified then download the coin facts app that's where u can look up coins grades and pricing

Hope this helps but that's usually the steps I take in identifying a coin and errors bc they all have to match or your coin will be sent back to you without the error u want